@DGC
Fallout3 and ME have leveling systems to my knowledge. If Fable 2 has no such system, it is questionable whether or not the game is an RPG. You can talk about the ability to make choices that affect your environment, but to a lesser degree I can do that in Prince of Persia, or the Sims, and neither of these is called an RPG.
I can't think of any game I would readily and easily defnie as an RPG that did not contain some kind of leveling system.
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